Infineon Technologies CY22800FXI

Overview

CY22800FXI from Cypress Semiconductor is a field-reprogrammable universal programmable clock generator (UPCG) with integrated PLL, spread spectrum clocking (SSCG), and VCXO capability. It supports 3.3 V operation, delivers up to three low-jitter clock outputs (CLKA/CLKB/CLKC), accepts crystal (8–30 MHz) or external clock (0.5–100 MHz) inputs, and targets EMI reduction in consumer and communications systems.

For engineers reviewing the CY22800FXI datasheet, CY22800FXI pinout, CY22800FXI application, or CY22800FXI equivalent, key selection criteria include its reprogrammability (up to 100 times), configurable spread-spectrum modulation depth (±0.25% to ±2.0%), VCXO analog tuning range (±200 ppm), industrial temperature rating (–40°C to +85°C), and 8-pin SOIC package compatibility with legacy clock synthesis designs.

Technical Context

The CY22800FXI implements a proprietary integer-N PLL architecture with programmable feedback dividers and output post-dividers, enabling precise frequency synthesis across multiple output channels. Its SSCG block modulates output frequencies using preprogrammed profiles to reduce peak EMI emissions without altering system timing margins.

VCXO functionality is implemented via an analog voltage-controlled tuning input (FS0/VCXO pin), allowing real-time frequency pulling of the reference crystal over ±200 ppm. Pin multiplexing (e.g., CLKA/FS0, CLKB/FS1, CLKC/FS2/VSS) enables configuration flexibility but requires correct mode selection per one-page datasheet configuration code.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (150 mils), surface-mount, RoHS-compliant, thermal resistance θ_JA = 140°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable clock generator applications.

Compared with IDT5V41001PGG and Si5351A-B-GM, the CY22800FXI uniquely combines field reprogrammability, analog VCXO tuning, and factory-configurable spread spectrum - making it optimal for industrial STB, DTV, and EMI-critical PCI designs where both flexibility and analog control are mandatory.

Availability

CY22800FXI is available at Aetrix Electronics and suitable for set-top box timing, MPEG-2 digital TV synchronization, HDTV pixel clock generation, and PCI/ASIC EMI reduction requiring stable component supply across industrial temperature ranges.

Supply support for CY22800FXI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable system-on-chip (PSoC), memory, and timing solutions for industrial, automotive, and consumer markets.

The CY22800 product line was designed specifically for flexible, low-cost clock synthesis in cost-sensitive consumer electronics and communications equipment - emphasizing field configurability, EMI mitigation, and rapid prototyping via dongle-based programming.

FAQ

What programming interface does the CY22800FXI require?

The CY22800FXI uses the CY36800 programmer dongle with Cypress-provided configuration software. Programming is performed via dedicated pins (FS0/FS1/FS2) using a serial protocol; no JTAG or SWD interface is present. Each configuration file corresponds to a specific one-page datasheet (e.g., CY22800-023A), and the device retains settings after power loss.

Does the CY22800FXI support differential outputs?

No, the CY22800FXI provides only single-ended LVCMOS outputs (CLKA, CLKB, CLKC) with rail-to-rail swing and 3.3 V logic levels. It lacks LVDS, HCSL, or differential signaling capability. For differential clock distribution, an external buffer such as the CY2308 or Si5330x series is required.

How is the VCXO function calibrated in production?

VCXO calibration is performed at wafer test using a precision frequency counter and voltage sweep. The device's analog tuning curve (±200 ppm over 0–3.3 V) is verified per Figure 2 in the datasheet. No end-user calibration is needed - the transfer function is factory-trimmed and remains stable over temperature and lifetime.

Can CLKA, CLKB, and CLKC operate at different frequencies simultaneously?

Yes - each output can be independently configured for different frequencies, division ratios, and modulation states (e.g., CLKA = 74.25 MHz spread, CLKB = 27 MHz clean, CLKC = 27.027 MHz VCXO-tracked). Configuration is determined by the selected one-page datasheet (e.g., CY22800-032A), and all three outputs update synchronously after programming.